Contract to demonstrate delegate call in solidity.

DelegateCall.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

// NOTE: Deploy this contract first
contract IronMan {

    uint public power;
    uint public speed;
    uint public impact;

    function increasePower(uint _scale) public payable {
        num = num + ( num * _scale );
        speed = speed + ( speed * _scale );
        impact = impact + ( impact * _scale );
    }
}

contract CaptainAmerica {

    uint public power;
    address public speed;
    uint public impact;

    function askIronManForHelp(address _ironMan) public payable {
        // Iron Man scales up Captain America's power.
        (bool success, bytes memory data) = _ironMan.delegatecall(
            abi.encodeWithSignature("increasePower(uint256)", 10)
        );
    }
}